MCQOPTIONS
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| 1. |
\[\frac{d}{dx}\left[ {{\tan }^{-1}}\sqrt{\frac{1-\cos x}{1+\cos x}} \right]=\] [BIT Ranchi 1989; Roorkee 1989; RPET 1996] |
| A. | \[-\frac{1}{2}\] |
| B. | 0 |
| C. | \[\frac{1}{2}\] |
| D. | 1 |
| Answer» D. 1 | |